Cloudmarque.Azure

1.0.1

Public/Core/budgets/New-CmAzCoreBillingRule.ps1

function New-CmAzCoreBillingRule {

    <#
        .Synopsis
          Deploys a set of budgets at the subscription level.
 
        .Description
         Completes the following:
            * Deploys a set of budgets at the subscription level.
            * Applies filtering via tags (cm-charge: accountnumber) to budgets for resource targeting.
            * Sets the action group to be notified once the threshold for a budget is met.
 
        .Parameter SettingsFile
         File path for the settings file to be converted into a settings object.
 
        .Parameter SettingsObject
         Object containing the configuration values required to run this cmdlet.
 
        .Component
         Core
 
        .Example
         New-CmAzCoreBillingRule -SettingsFile "c:/directory/settingsFile.yml"
 
        .Example
         New-CmAzCoreBillingRule -SettingsObject $settings
    #>

    [CmdletBinding(SupportsShouldProcess, ConfirmImpact = "Medium")]
    param(
        [parameter(Mandatory = $true, ParameterSetName = "Settings File")]
        [String]$SettingsFile,
        [parameter(Mandatory = $true, ParameterSetName = "Settings Object")]
        [Object]$SettingsObject
    )

    $ErrorActionPreference = "Stop"

    try {

        if ($PSCmdlet.ShouldProcess((Get-CmAzSubscriptionName), "Deploying billing rules")) {

            if ($SettingsFile -and !$SettingsObject) {
                $SettingsObject = Get-CmAzSettingsFile -Path $SettingsFile
            }
            elseif (!$SettingsFile -and !$SettingsObject) {
                Write-Error "No valid input settings." -Category InvalidArgument -CategoryTargetName "SettingsObject"
            }

            if (!$SettingsObject.Location) {
                Write-Error "Please provide a valid location." -Category InvalidArgument -CategoryTargetName "Location"
            }

            if (!$SettingsObject.Budgets) {
                Write-Error "Please provide at least one budget." -Category InvalidArgument -CategoryTargetName "Budgets"
            }

            $actionGroupResourceId = Get-CmAzService -Service "core.monitoring.actiongroup.priority1" -ThrowIfUnavailable | ForEach-Object { $_.ResourceId }

            $budgets = $SettingsObject.Budgets

            foreach($budget in $budgets) {

                Write-Verbose "Validating budget: $($budget.Name)..."

                if (!$budget.Name) {
                    Write-Error "Please provide a valid budget name." -Category InvalidArgument -CategoryTargetName "Budgets.Name"
                }
                elseif (!$budget.Category) {
                    Write-Error "Please provide a valid category." -Category InvalidArgument -CategoryTargetName "Budgets.Category"
                }
                elseif (!$budget.AccountNumber) {
                    Write-Error "Please provide a valid budget account number" -Category InvalidArgument -CategoryTargetName "Budgets.AccountNumber"
                }
                elseif (!$budget.Timegrain) {
                    Write-Error "Please provide a valid timegrain." -Category InvalidArgument -CategoryTargetName "Budgets.Timegrain"
                }
                elseif (!$budget.Amount) {
                    Write-Error "Please ensure the budget amount is greater than 0." -Category InvalidArgument -CategoryTargetName "Budgets.Amount"
                }
                elseif (!$budget.Thresholds) {
                    Write-Error "Please provide budget thresholds that are greater than 0." -Category InvalidArgument -CategoryTargetName "Budgets.Thresholds"
                }
                elseif (![DateTime]::TryParse($budget.StartDate, [ref]$validStartDate)) {
                    Write-Error "Please ensure the budget start date is a valid date." -Category InvalidArgument -CategoryTargetName "Budgets.StartDate"
                }
                elseif (![DateTime]::TryParse($budget.EndDate, [ref]$validEndDate)) {
                    Write-Error "Please ensure the budget end date is a valid date." -Category InvalidArgument -CategoryTargetName "Budgets.EndDate"
                }

                Write-Verbose "Generating budget name..."
                $budget.Name = Get-CmAzResourceName -Resource "Budget" -Architecture "Core" -Region $SettingsObject.Location -Name $budget.Name

                # Workaround as ARM templates don't support additional copy objects nested within a copied resource.
                # Required for multiple notifications over multiple budgets.

                Write-Verbose "Creating notifications for budget..."
                $notifications = @{ }

                for ($i = 0; $i -lt $budget.Thresholds.Count; $i++) {

                    $notifications["Notification$i"] = @{
                        enabled = $true;
                        operator = "GreaterThanOrEqualTo";
                        threshold = $budget.Thresholds[$i];
                        contactGroups = @($actionGroupResourceId);
                        contactRoles = @(
                            "Owner",
                            "Contributor",
                            "Reader"
                        )
                    }
                }

                $budget.Notifications = $notifications
            }

            Write-Verbose "Deploying budgets..."
            New-AzDeployment `
                -Location $SettingsObject.Location `
                -TemplateFile "$PSScriptRoot\New-CmAzCoreBillingRule.json" `
                -Budgets $budgets `
                -AccountFlagName "cm.charge"

            Write-Verbose "Finished!"
        }
    }
    catch {
        $PSCmdlet.ThrowTerminatingError($PSItem);
    }
}